On Thu, 4 Jul 2013, David Howells wrote:
> Milosz Tanski <[email protected]> wrote:
> 
> > > Looking at your index structure, ceph has per-fsid indices under the top
> > > "ceph" index and then per-inode indices under those?  Are fsids 
> > > universally
> > > unique - or just for a given server/cell/whatever?
> > 
> > It's my understanding that's a guuid assigned to the cluster.
> 
> What's the likelyhood of two clusters throwing up the same guuid?

1 in 2^128.  The uuid comes from /dev/random, courtesy of uuidgen.

sage
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